The HK327 handbrake return spring should be part 7449424 according to the parts manual and should be hooked into a small hole drilled into the drivers side seat nut plate (YELLOW dot) according to several other cars I've seen, but mine wasnt.
My drivers side seat nut plate dosent have the small hole and there was no sign of the spring ever being hooked into the rear of the plate either.

There was however an obvious wear mark in the larger hole (RED dot) in the floor brace directly behind the seat nut plate so obviously my spring had spent many years in that location.
The only way to reach that location is to have a longer spring and thats what I've installed, but apparently the longer spring wasnt available until 1970 so I've been told.

So is this location a change during HK production or is it just another Dandenong thing?
Should I use and overstretch the 7449424 spring to make it fit or stick with the longer spring that never existed yet fits like a glove?

I'd rather not drill a hole where there wasnt one before.

Thanks, Wayne

I have seen HK 's with the straight part of the spring slid inside the small hollow section next to the bolt

I have drawn a black line to indicate

I just don't have or can find a picture or photo of the spring to suit

My HK GTS is as Sandaro says. It is a week 1 July 1968 car, but all of the driveline, exhaust, crossmember, banjo etc came from a really low mile untouched HK Brougham. But obviously Powerglide and single exhaust though.

Pafe 224 of the original SP HK manual #75 shows a great image, but I can't see the spring.

Edited by user Saturday, 18 May 2019 11:11:24 AM(UTC)  | Reason: Not specified

Yeah I noticed it had no spring at all in that photo

I think Nicks spring goes over to the passengers side and hooks through a small hole in his shifter support bracket.
Its starting to look like every GMH plant did something different, or maybe they did nothing and the springs were installed by the dealership.

My spring is where it was so that'll do me.

Guys

Getting a new aftermarket gearbox crossmember made this week with the mount centred in the crossmember rather than offset 1/2" to the passenger side like the originals are.

I can't remember if the handbrake support is different or not for V8 Powerglide with single exhaust and Saginaw with dual exhaust. We talked about the springs and the lever being different but I can't remember if the mount itself changes. I just want to ensure they put the right one on if they are different.

That part number appears to be common to all HK, so also really answers the question for me. The M21/22 shifter support must weld straight to this for that application. I'm getting one of these made but with the mount centred:

https://www.ebay.com.au/...4761:g:2UMAAOSwfO1cy27U

Only using this rather than an original (with the stepdown bracket modded to centre the box) simply to give me more room around the back of the box to fit dual 2.5" pipes and for the TH350 shifter linkage.